/**
 * EXPERIMENTAL: Phase-boundary receipt rollup builder (receipt-of-receipts).
 *
 * This builder is not wired into finalize or retire yet; child receipts remain
 * authoritative until a lifecycle integration preserves their supersession
 * semantics. It is retained for controlled integration experiments only.
 */
import type { TaskResultReceipt } from "../task/receipt";
import { type BuildReceiptInput, type PhaseRollupEvidence, type ReceiptEnvelope } from "./receipts";
export interface BuildPhaseRollupInput {
    receiptId: string;
    sessionId: string;
    source: string;
    subject: BuildReceiptInput<PhaseRollupEvidence>["subject"];
    phase: string;
    children: readonly TaskResultReceipt[];
    /** Supply for deterministic output; defaults to now. */
    createdAt?: string;
}
export declare function buildPhaseRollupReceipt(input: BuildPhaseRollupInput): ReceiptEnvelope<PhaseRollupEvidence>;